ok i got 2 questions to ask
1: if my gf is on birth controe is it as effictive against pregnecy as a condome?
2: whne puting on a condom do i pull the foreskin back below the head or put hte condom on over the foreskin?

1. If both are used properly, and the condom does not break, a condom is more effective, as it is then effectively 100% effective; oral contraceptive pills are not quite as effective. However in real life condoms occasionally break (usually from being old or stored in too warm a place); but also the pill can be forgotten.

The combination of both provides effectively 100% protection in practice.

Only condoms provide protection against STDs (but not complete protection in the case of genital warts and herpes).